Can anyone tell me the changes to the V123 engines through the run. Specifically, 1933 to 1936? I have been told there were piston and ring changes? Any other?
And gearbox changes?
The question is a little to broad to answer. The best would be to go through the parts book line for line.
Hollander Interchange manual lists Engines 31-35 and 36-37 as different. Cyl heads 31-early33 and late33-37 , connecting rods a change in pin diameter in 1932. The transmissions for all models 31-35, some to 37 basic the same ,but different main shafts ,clusters, etc.And cases did change.
Reprint parts books are easy to get. It is what I would do. Warren